About the Authors: (from TheCollege Mathematics Journal, Vol. 8 (1977)) Allen H. Holmes worked with UICSM, was assistant professor of mathematics at the University of Missouri, St. Louis, and is presently the Schilling Professor of Mathematics at the St. Paul Academy and Summit School. He is mainly concerned with vector geometry, probability and statistics, music and astronomy.

Walter J. Sanders has taught high school in the state of Washington and has been a faculty member at Chico State College, Western Washington State College and the University of Illinois. He is currently Associate Professor of Elementary Education and Director of the Mathematics Curriculum Laboratory at Indiana State University. His interests are in curricular development and teacher preparation.

John W. LeDuc has taught at Maine Township High School and Elgin Community College and is currently Associate Professor of Mathematics at Eastern Illinois University, Charleston, Illinois, where he has been since 1965. His particular interests are teacher preparation and curriculum development.